Gastrointestinal exams are usually done by hanging out with the Department of Gastroenterology. Gastroenterology is a department that focuses on the study of diseases of the esophagus, large intestine, small intestine, stomach, liver, gallbladder, and pancreas. Gastroenterology can be used to check esophagogastrointestinal function tests, gastroscopy, liver function tests, and ultrasound endoscopy of the digestive tract. Gastrointestinal examination is usually hang gastroenterology, the most common is gastroenteroscopy, gastroscopy parts including esophagus, stomach, duodenum, enteroscopy is mainly from the anus into the view of the rectum to the ileum intestinal examination, you can detect whether the gastrointestinal mucosa lesions, whether there is bile reflux, whether there is a polyp ulceration occupancy and so on. But in the gastroenteroscopy, but also need to pay attention to should be carried out in the fasting state, do a good job of preoperative examination work, keep the gastrointestinal tract clean and clean.